Hauv PTFE cov khoom, ntimPTFE cov khoomyog cov khoom loj tshaj plaws, nyob rau txawv teb chaws tau sau PTFE feem ntau ua tiav los ntawm PTFE cob cog cog, xws li lub teb chaws Yelemees Hoechst HosTaflonTF4000 series, HosTaflonTF3000 series thiab HosTaflon2000 series.Nyob rau hauv Suav teb, txij li thaum PTFE resin ntau lawm technology lags qab cov txheej txheem technology, PTFE filling tshuab yog ua nyob rau hauv cov khoom ua cov nroj tsuag.Los ntawm kev ntxiv cov khoom sib txawv xws li inorganic, hlau thiab polymer hauv PTFE resin los txhim kho lub siab tsis kam, hnav tsis kam, txias tsis kam, kub tsis kam, qhov ruaj khov ntawm PTFE.Cov khoom ntim tau muab piv nrog cov ntshiab PTFE, siab tsis kam nce los ntawm 5 mus rau 10 npaug, hnav tsis kam nce los ntawm 1000 zaug, cov coefficient ntawm linear expansion txo los ntawm 80%, thermal conductivity nce 5 zaug, thiab txo qhov ntim tsis kam thiab nto kuj, feem ntau siv nyob rau hauv kev lag luam kev lag luam rau roj-dawb lubrication bearings, bearing bushings, piston rings, tshuab cuab yeej qhia, thiab lwm yam. Nyob rau hauv xyoo tas los no, txawv teb chaws tshuaj tiv thaiv corrosion, ntim nrog PTFE raws li ib tug pipeline, li qub, twj tso kua mis, thiab lwm yam. hauv ob sab phlu yog tsim sai heev, uas yog ib tug tshiab daim ntawv thov cheeb tsam ntawm puv PTFE.
Raws li cov kev cai no feem ntau siv fillers yog: iav fiber, carbon fiber, graphite, quartz xuab zeb, molybdenum disulfide, amorphous carbon, calcium fluoride, bronze hmoov, ceramics, polyimide, polyphenylene, poly-p-hydroxyformate thiab hais txog.
Cov khoom ntim PTFE feem ntau yog molded: qhov zoo ntawm cov khoom ntimPTFE cov khoomnyob ntawm qhov kev xaiv ntawm resin muab tub lim, qhov tsim ntawm cov mis, qib ntawm homogeneity ntawm cov khoom sib xyaw thiab lwm yam.Tam sim no muaj peb txoj kev sib xyaw siv los sau PTFE: (1) cov txheej txheem sib xyaw qhuav yuav tsum muaj cov khoom sib xyaw nrawm, tsis muaj qhov chaw tuag, muaj feem xyuam rau cov kev xav tau ntawm cov khoom.(2) Cov kuab tshuaj sib tov, cov kuab tshuaj yog acetone los yog methanol, rau iav-filled PTFE.(3) kev sib xyaw ntub dej: kev siv cov txheej txheem molding khoom uas muaj zog txhua yam, tsis tshua muaj hnav, zoo corrosion kuj.Lub siab molding ntawm cov khoom ntim PTFE nyob ntawm qhov ntim piv ntawm muab tub lim hauv PTFE, xws li: nrog 5% muab tub lim molding siab ntawm 250 bar;nrog 6% mus rau 10% muab tub lim molding siab ntawm 350 bar;nrog 12% mus rau 25% muab tub lim molding siab ntawm 500 bar;nrog ntau tshaj 25% muab tub lim molding siab ntawm 700 bar.Cov txheej txheem sintering rau cov khoom ntim yog tib yam li rau PTFE ntshiab.Tab sis cov khoom ntim uas muaj MoS2 yuav tsum tau sintering hauv huab cua nruab nrab ntawm 360 ℃, lossis sintering hauv nitrogen nruab nrab ntawm 380 ℃.Cov khoom ntim uas muaj iav fiber ntau yog tsim rau sintering hauv nitrogen nruab nrab.
Post lub sij hawm: Feb-11-2022